15982643 has 2 divisors, whose sum is σ = 15982644. Its totient is φ = 15982642.

The previous prime is 15982609. The next prime is 15982663. The reversal of 15982643 is 34628951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15982643 - 2²⁰ = 14934067 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 15982597 and 15982606.

It is not a weakly prime, because it can be changed into another prime (15982663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7991321 + 7991322.

It is an arithmetic number, because the mean of its divisors is an integer number (7991322).

Almost surely, 2^15982643 is an apocalyptic number.

15982643 is a deficient number, since it is larger than the sum of its proper divisors (1).

15982643 is an equidigital number, since it uses as much as digits as its factorization.

15982643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 15982643 is about 3997.8297862715. The cubic root of 15982643 is about 251.8930584700.

The spelling of 15982643 in words is "fifteen million, nine hundred eighty-two thousand, six hundred forty-three".